Removal of Remazol Blue by azoreductase from newly isolated bacteria

Karatay, Sevgi Ertuğrul; Kılıç, Nur Koçberber; Dönmez, Gönül

doi:10.1016/j.ecoleng.2015.09.037

Cited by 29 publications

(15 citation statements)

References 20 publications

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“…In another study, Karatay et al (2015) stated that the optimum pH for Remazol Blue decolorization by B. megaterium, Micrococcus luteus and Bacillus pumilus via Remazol Blue was 7. B. megaterium could decolorize Remazol Blue dye with the percentage of 60.8% at pH7; it was stated that Bacillus pumilus optimally decolorized Remazol Blue (76.7%) at pH 7 [25]. The results obtained in that study show similarity with the current study.…”

Section: The Effect Of Ph On Decolorization Of Rb19 Dyesupporting

confidence: 86%

“…was related with NADH depended on azoreductase [24]. It was indicated at Karatay et al's (2015) research that azoreductase enzyme was responsible for the decolorization of Remazol Blue dye by Bacillus pumilus and B.megaterium [25]. Despite the mentioned study, azoreductase activity was obtained by the method used in the current study.…”

Section: Enzyme Activitiesmentioning

confidence: 59%

“…B. pumilus removed the tested dye in all concentrations at the approximately the same rate. Similarly, the decolorization rate was observed to decrease with M. luteus when the dye concentration decreased [25].…”

Section: The Effect Of Different Initial Dye Concentrations On Decolomentioning

confidence: 83%

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Decolorization of Reactıve Blue 19 Dye By Bacillus Megaterium Isolated From Soil

Erdem

Türkmen²,

Aracagök³

et al. 2019

Hacettepe Journal of Biology and Chemistry

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B u çalışma da Reactive Blue 19 boyasının Bacillus megaterium (B. megaterium) ile renginin giderimi ve pH, sıcaklık, başlangıç boya konsantrasyonu, azot ve karbon kaynağı gibi parametrelerin renk giderimi üzerindeki etkisinin belirlenmesi amaçlanmıştır. Bu amaçla, izolasyonu yapılan ve genotipik olarak (16S rRNA sekansı) B. megaterium olarak tanımlanan, izolatın Reactive Blue 19'un renk gideriminde etkili olduğu bulunmuştur. %92 giderim ile glukoz en uygun karbon kaynağı olarak saptanmıştır. Azot kaynağının etkisi araştırıldığında %91 ile en yüksek giderim oranı maya özütünde tespit edilmiştir. Önemli parametrelerden bir olan pH'ın etkisine bakıldığında nötral pH değerinde B. megaterium' un Reactive Blue 19 boyasını renk giderimin %91 oranında gerçekleştirildiği belirlenmiştir. FTIR sonuçlarına göre Reactive Blue 19'un renk gideriminin biyodegradasyon ile gerçekleştiği gözlemlenmiştir. Kimyasal ve fiziksel atık su arıtım metodları biyolojik metodlarla karşılaştırıldığında B. megaterium gibi mikrobiyal kaynaklar etkili ve ekonomik bir alternatif olarak değerlendirilebilir.

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Section: The Effect Of Ph On Decolorization Of Rb19 Dyesupporting

confidence: 86%

Section: Enzyme Activitiesmentioning

confidence: 59%

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Decolorization of Reactıve Blue 19 Dye By Bacillus Megaterium Isolated From Soil

Erdem

Türkmen²,

Aracagök³

et al. 2019

Hacettepe Journal of Biology and Chemistry

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“…Behind both mechanisms, enzymes are well involved to degrade recalcitrant compounds in the microbial system. 120 Several reports demonstrate the degradation of complex organic substances by different enzymes including laccase, 121,122 azoreductase, 123,124 lignin peroxidase, 6 NADH-DCIP reductase 99 and hexane oxidase. 25 Among these families of enzymes, laccases and azoreductases have shown a great potential to decolorize a large range of known industrial dyes.…”

Section: Mechanism Of Azo Dye Degradationmentioning

confidence: 99%

Untitled

2019

JTEFT

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Textile dyeing industries are facing problems to meet the green practices standards for safe discharge of wastewater due to its complex nature. TWWs are a complex mixture of salts, acids, heavy metals, organ-chlorine-based pesticides, pigments and dyes. 5,10 TWWs generated from the different wet processes are characterized by high pH, temperature, BOD, COD, detergents, surfactants, suspended and dissolved solids, dispersants, leveling agents, toxic organics, chlorinated compounds, sulphide and formaldehyde, may be added to improve dye adsorption onto the fibers 9 and more details are mentioned in the Figure 1. Such effluents are also characterized by the presence of heavy metals, such as Cr, Zn, Cu and Al due to metal-based complexes dyes. 10,14 The most common textile operates are desizing, bleaching, mercerizing, dyeing and finishing. 15 Characteristics and the amount of TWWs depend to the process, dyeing is the most one which requires large volumes of water not only in the step of adding color to the fibers, in dye bath, but also during the rinsing step. Mercerizing and finishing are also significant generators of TWWs. In addition, equipment, machines and chemicals, 5 such as detergents and stabilizers, alter significantly the nature of TWWs. Another important factor which contributes to the ecotoxicity and the volume of TWWs is that dyeing and finishing processes, especially, require the imput of a wide range of dyestuffs. The Variety of dyes depends to the fiber used. 16 For example, cellulose fiber requires the application of direct, reactive, vat, azo or sulfide dyes. Acid dyes are used essentially for wool and silk. Azo and disperse dyes are applied to the polyester fiber. A large quantity of these dyes is released in the TWWs due to their degree of fixation to fibers. AbstractThe textile wastewaters (TWWs) are one of the major sources of environmental pollution, due to the presence of various recalcitrant dyes. It is estimated that about 300,000 t of synthetic dyes are discharged in TWWs every year worldwide. Thus, untreated or incompletely treated TWWs cause harm to aquatic and terrestrial life. To avoid the negative impacts associated to the discharge of TWWs into the natural ecosystems, effective dye remediation processes are being developed. Current methods of removing dyes from TWWs are generally regarded to be complex, expensive and energy demanding processes. Therefore, bioremediation of TWWs using microbial consortia has appeared as an emerging alternative for textile dyes removal. This chapter provides an updated literature on the application of microbial consortia in the treatment of TWWs, focusing on the mechanisms involved in dye biodegradation and the main interactions established between the consortia members and how they can influence dye removal efficiencies.

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“…The reaction pH significantly affecting the activity of SRB and the solubility of sulfide [23] plays an important role in the bioprocess of removing heavy metal [24]. This is because the activity of bacteria was inhibited at low pH [13,25].…”

Section: Effect Of Ph and Temperaturementioning

confidence: 99%

Immobilizing Metal-Resistant Sulfate-Reducing Bacteria for Cadmium Removal from Aqueous Solutions

Zhang¹,

Li²,

Li³

et al. 2018

Pol. J. Environ. Stud.

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IntroductionOwing to the rapid development of industry, the resulting huge amount of wastewater containing heavy metals has posed a serious challenge to environmental protection. Among heavy metals, cadmium (Cd) is one of the most hazardous materials affecting the environment [1]. As an element of multiple industrial purposes, Cd is widely used in modern industries such as nickel-cadmium batteries, pigments, alloys, phosphate fertilizers, pesticides, textile operations, metal plating, Pol. J. Environ. Stud. Vol. 27, No. 6 (2018), 2851-2859 AbstractImmobilized sulfate-reducing bacteria (SRB) in polyvinyl alcohol (PVA)-sodium alginate matrix were applied as biosorbents to remove cadmium (Cd) from aqueous solutions. Multiple characterization techniques including scanning electron microscope (SEM)-energy dispersive spectrometer (EDS), and Fourier transform infrared (FT-IR) spectra indicate that immobilized beads provided a suitable microenvironment for SRB. Performance tests show that Cd removal was highly affected by pH value and temperature, with optimum temperature at 35ºC and pH value of 8.0. A pseudo second-order model was applied to describe the adsorption kinetic. FT-IR and x-ray photoelectron spectroscopy (XPS) analyses imply that biosorption, sulfide, and hydroxide precipitation are the main mechanisms for removing Cd. The immobilized SRB beads have great potential for remediating Cd-containing wastewater.

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Removal of Remazol Blue by azoreductase from newly isolated bacteria

Cited by 29 publications

References 20 publications

Decolorization of Reactıve Blue 19 Dye By Bacillus Megaterium Isolated From Soil

Decolorization of Reactıve Blue 19 Dye By Bacillus Megaterium Isolated From Soil

Untitled

Immobilizing Metal-Resistant Sulfate-Reducing Bacteria for Cadmium Removal from Aqueous Solutions

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